| 摘要 |
PURPOSE:To easily adjust the light condensing direction of a condenser mirror by providing a finder indicating the same direction as the center line of the light condensing range of the condenser mirror. CONSTITUTION:An infrared sensor 2 is provided in an about focus position of a condenser mirror 1 whose inside face 1a is formed into a concave mirror, and the condenser mirror 1 is fixed and can be shaked freely horizontally and vertically by a multijoint 3. A knob 4 which shakes the condenser mirror 1 is provided with a through hole 5 so that the direction of this hole 5 coincides with the direction of a center line A of the light condensing range of the condenser mirror 1. The light condensing direction is detected in accordance with the direction of the through hole 5 through the condenser mirror 1 cannot be seen from the external, and the light condensing direction is easily and surely adjusted. |
